Device for stopping railroad vehicles independently of the driver



Aug. 7, 1928.

P. FRIEDEL DEVICE FOR STOPPING RAILROAD VEHICLES INDEPENDENTLY OF THE DRIVER Filed Jul 15, 1926 Ila I Patented Aug. 7, 1928. I

ISTATES FFEQE- PAUL FRIEDEL, or BOHLEN, GERMANY.

i Application filed July 15, 1926, Serial No.

- This invention relates to a device for stopping railroad vehicles independently of the driver in case the stop signal should remaln unnoticed, and the invention consists in the provision of a track apparatus in the form of a resiliently supported platform arranged so as to be depressed by the vehicle wheels, a pivoted arm which is controlled by the platform, being arranged so as to turn, under the movement of the same, into position for engagement with a brake and signalling lever on the vehicle. Means are provided whereby the platform and its arm are moved horizontally into and outof operative position together with the operation of the semahore. p Fig. 1 of the accompanying drawings represents a side view of the device on the point of being operated,

Fig. 2, a view of the vehicle portion of the apparatus in operated position,

Fig.3, a view of the device at right angles to Fig. 1,

Fig. 4c, a plan of the same, 7 Fig. 5, asection of the track apparatus 0 the line. VV of Fig. 4 and on an enlarged scale,

gig. 6, a section at right angles to Fig. 5, an

Fig. 7, a plan of the track apparatus on a still larger scale.

Arranged on the railroad track near one of the rails 1, is a casing 7 in which a platform 3 is resiliently supported on a level with the rail head. {Theplatform is guided by vertical bolts tin a supporting plate 5 andbears against the latter by means of springs 6 arranged on the bolts. The supporting plate 5 is held in guideways in the casing walls 8 so that it can be operated for shifting the platform 3 towards and away from the railhead. Springs 15 connected to the casing wall 14 and to the platform 3 tend to hold the latter against the rail head so that it will be engaged and depressed by the rim 34 of the Wheel 35 of a passing vehicle, as shown in-Figq3. The shifting of the platform 3 away from the rail into its inoperative position is effected automatically when the semaphore signal is set on clear. For'this purpose the plate 5 is connected at 16 to a rope 17 which is guided over a sheave 18 in the casing 7 and which is attached through the medium of a spring 33 to a rope 20. The latter passes over a deflecting pulley 19 and is connected to'the rope 21 122,650, and in Germany June 14, 1326.

which rotates the 'wheel 22 whereby the 0011 trol rod 23 of the arm of the semaphore 2 is operated. The spring 33 allows the rope 20 to move independently of the plate 5 whose movement is limited by the casing wall 32.

The depression of the platform 3 by the wheel rim 34 is utilized for applying the brake of the vehicle. For this purpose the vehicle frame 2 1 is fitted with adoublearmed lever which rocks about a pivot 27. The lower, bent arm 25 of this lever is ar ranged so as to pass across the platform 3 if the latter is in operative position. The up per arm 26 of the lever is connected by ropes 30 and 31 with the audible signalling device and the air-brake of the vehicle so that they will be operated if the lever is turned into the position shown in Fig. 2. This turning of the lever is effected by means of an arm 11 which is guided in a split 12 in the platform 3 and brought up through said split when the platform is depressed, so as to enter the path of the lever arm 25. The arm 11 is mounted loosely on a shaft 9 which is held in brackets on the casing wall 8. Another arm 10 which controls the arm 11 is connected by a link 13 to the platform 3 so that when the latter is lowered, the arm 11 is turned up through the slit 12. The arm 11 projects through an elongated aperture in the casing wall 8 and follows, together with the arm 10 and the link 13, the horizontal adjustment of the platform 3 by sliding on the shaft 9.

The springs 15 maintain the device in operative position so long as the semaphore arm is raised. If a vehicle should pass the signal, the lever 25. 26 will be operated by the arm 11, the audible signal of the vehicle will be sounded as a warning to the driver and the brake will be automatically applied. If the road should be clear. and the semaphore arm is lowered accordingly, the platform 3 will be pulled away from the rail 1 by the ropes 20 and 17, and as it is now out of reach of the wheel rim 34:, the vehicle can pass the signal without being affected by the device.

The lever arm 25 is preferably fitted with a springpressed notch 28 which co-operates with a toothed rack 21 for retaining the lever in operated position.

If the signal and brake are operated electrically, the ropes 30 and 31 are substituted by suitable switch elements.

The springs 15 may be replaced by the vehicle and to prepare said arm forenhicles independently of the driver, the Com bination with a signal and brake operatmg lever on the vehlele and an actuating arm mounted on the track, of aresiliently supported platform adapted to be dearessed b en 'a ement with the 'Wheels of gagement with the operating lever when thus depressed, a horizontally adjustable supporting plate for said platform, bolts connected to the platform and guided in said plate, supporting springs arranged on the bolts soas to bear againstthe plate and.

support the platform; springs tending to hold the platiorm against the track rail in operative position, and a rope acting onthe supporting plate for shifting the latter and the platform out of operative position.

The struoture claimed in'claim l' in' combinationwitha spring incorporated with said rope, and Connection between therope and the sen'iaphore signal for Jsnnultaneous operation. t

- PAUL'FRIEDEL." 

